Weather Louvres - WLL  

   
   
TYPE WL Weather Louvre manufactured of extruded Type 50S are held in place by screws. Blades are spaced 50mm apart.
   
Standard Spacing Top blade fits flush with frame. Lip of Bottom Blade overlap frame.
     
Accessories WM = Wire Mesh
  OBD = Opposed Blade Damper NOTE: Adjustment from face of Louvre is not advisable.
  PC = Punched Counter Sunk Holes
Dimensions ON = Normal Duct size
Notes (1) Alternative Meshes available on request
  (2)
For Weather Louvres smaller than 450 x 300 we recommend the use of Type RA with RARB Blade with19mm spacing.
Type WL:      Weather Louvre
Vermin Protection:   = Plastic Bird mesh - Standard
    = Galvanised wire mesh
Finishing Options NA = Natural Anodised
  EPC = Epoxy Powder Coating
     
Ordering Procedure: Example
REF QTY SIZE (LxH) TYPE ACCESS FRAME FINISH SPECIAL INSTRUCTIONS
1 12 1000 x 850 WL - 50 F.S.  
 
Note
(1)  Dimensions given are for ON size 
(2)  If code "OS" is entered under SPECIAL INSTRUCTIONS, then dimensions given are over flange 
 
 
EXAMPLE
Volume: 0,4m3/s 
Velocity:   2.5m/s
Result:  0.16m/2
OR:  400mm x 400mm
NR:   35
PRESSURE LOSS: 30PA
 
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